Im trying to generate the SHA512 of a base64 encoded string with Crypto++.
My sample input is: test123
Base64: dGVzdDEyMw==
SHA512 of B64 (expected):
f78fa0aa79abd53b8181c5d21bdeb882bf45cd462a6e6e1b5043417de1800626
ed2a51b1a56626e9b9558da66a2f609d31db76bd88e80afbb7b03cda518b207d
SHA512 of B64 (not expected): 9f012fff26c89f2650f7446a37e80ba6466d69ffc77bb9ffc8c09ab779b24a23bb6a2f3c28512668ebca8628303ab5a31067d930cd1af60c745a2c34e5b4b1d2
SHA512 calculation:
byte *digest = new byte[CryptoPP::SHA512::DIGESTSIZE];
std::string encoded;
std::string test("test123");
CryptoPP::StringSource ss((byte*)test.data(), test.size(), true, new CryptoPP::Base64Encoder(new CryptoPP::StringSink(encoded))); // StringSource
// Calculate hash
CryptoPP::SHA512().CalculateDigest(digest, (byte*)encoded.data(), encoded.size());
If i leave out base64 and calculate the SHA512 directly, i get the correct hash. Therefore the calculation can't be completely wrong.
But why doesn't it work with base64?